You really only get good money for the main bits...
ie. Motor, gearbox, etc
Its all the little bits that are worthless, plus you will find people after stuff you need to further strip and then may be difficult to sell then...
ie. "I want your rb26 head" then you will find it hard to sell the block for instance...
Keep it together, wreaked GTR's are for parts, if its registered atm keep it that way...